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Isidor Gunsberg vs Simon Winawer
3rd DSB Congress, Nuremberg (1883), Nuremberg GER, rd 1, Jul-16
Queen Pawn Game: Zukertort Variation (D02)  ·  1-0

8
7
6
5
4
3
2
a
1
b
c
d
e
f
g
h
White to move.
ANALYSIS [x]
Notes by Stockfish 9 v010218 (minimum 6s/ply)4...Nd7 was played in G Sachs vs A Galliamova, 1992 (0-1)5...Nd7 was played in A Le Diouron vs N Maisuradze, 2012 (0-1) 6.c4 Nf6 7.Nc3 O-O 8.Nh4 dxc4 9.Nxf5 exf5 10.Bxc4 = +0.39 (17 ply)= -0.48 (19 ply)better is 7.Bb2 O-O 8.Nbd2 Nbd7 9.c4 Ne4 10.Ne5 Qe7 11.Nxe4 = +0.16 (24 ply)= -0.38 (26 ply) after 7...O-O 8.Nbd2 Nbd7 9.Bb2 h6 10.Ne5 Rc8 11.c5 Bc7 9.Bb2 O-O 10.Rc1 Re8 11.h3 Ne4 12.Nxe4 Bxe4 13.c5 Bc7 = +0.11 (18 ply) 9...O-O 10.Bb2 Qe7 11.h3 Rfe8 12.Nf3 Rad8 13.a4 Bg6 ⩱ -0.78 (18 ply)= +0.14 (24 ply) 10...O-O 11.Bb2 Qd8 12.a4 a5 13.Nf3 Re8 14.Bd3 Bb4 15.Rc1 ⩱ -0.53 (18 ply) ⩲ +0.74 (19 ply) 11...Rg8 12.g4 Bh7 13.cxd5 cxd5 14.Bb2 h5 15.e4 Bh2+ = 0.00 (26 ply) 12.cxd5 cxd5 13.e4 dxe4 14.Bb5 a6 15.Bxd7+ Kxd7 16.Ncxe4 ⩲ +1.34 (29 ply) 12...Bb4 13.Bd2 g4 14.h4 Bxc3 15.Bxc3 Ne4 16.Qc1 Qd8 ⩱ -0.98 (24 ply)= -0.14 (22 ply) 13...Ne4 14.Nxe4 Bxe4 15.Bb2 O-O 16.a4 Qd8 17.g3 f5 ⩱ -0.68 (18 ply) ⩲ +0.77 (17 ply) 16.Rc1 Kf8 17.Qd2 Rg6 18.cxd5 cxd5 19.Bd3 Bxd3 20.Qxd3 ⩲ +0.97 (20 ply)= -0.12 (25 ply) 17...Qc7 18.a3 dxc4 19.bxc4 Be7 20.Ne2 Nf8 21.d5 O-O-O = -0.35 (26 ply)better is 18.Red1 Qd8 19.Ne2 Bd6 20.Nf4 Rg7 21.Nh3 Qe7 22.Rac1 Bc7 ⩲ +0.84 (23 ply) 18...Bd6 19.cxd5 Nxd5 20.Nxd5 cxd5 21.e4 dxe4 22.fxe4 = +0.12 (28 ply) ± +1.81 (27 ply)better is 19...Qc7 20.Bd2 O-O-O 21.cxd5 Nxd5 22.e4 Ne7 23.b4 e5 ⩲ +1.13 (25 ply) 20.cxd5 exd5 21.Bd2 Kg8 22.e4 dxe4 23.fxe4 Ng4 24.Qxg3 ± +1.81 (31 ply) 20...Kg8 21.cxd5 cxd5 22.Red1 Ne8 23.e4 dxe4 24.fxe4 Rg4 ⩲ +0.98 (30 ply)better is 21.cxd5 cxd5 22.Bb4+ Kg8 23.Bd6 Ne8 24.Bxg3 Ng7 25.e4 ± +1.87 (32 ply) ⩲ +1.37 (28 ply)better is 22...a5 23.Bxg3 Ne8 24.e4 dxe4 25.fxe4 Qe7 26.Qf3 Ndf6 ± +1.53 (26 ply) ± +2.03 (34 ply) 25...Nxd6 26.exd6 Nf8 27.Rab1 b6 28.c5 Qxh4 29.Rec1 Rd8 ± +1.70 (32 ply)+- +2.98 (32 ply) 27...Qa5 28.Nxg3 Nxd6 29.cxd6 Qc3 30.Nf5 Qxe5 31.Rab1 b6 ± +2.07 (21 ply)+- +3.98 (29 ply) 29...Qb2 30.Qf5 b5 31.Rac1 Rf8 32.f4 Kg7 33.Rc2 Qxa3 +- +3.31 (18 ply)better is 30.f4 Qd8 31.Nxg3 Rg4 32.Nf5 Kh7 33.g3 Nb6 34.e4 Nc4 +- +5.39 (26 ply)+- +3.15 (28 ply) 31.Kg1 Qxh4 32.f4 Qg4 33.Qxg4 Rxg4 34.Rab1 Nb6 35.a4 Rb8 +- +3.81 (31 ply)= +0.13 (25 ply) 32.Qf5 Rxe5 33.Qh3 Qxd6 34.Qxg3+ Kh7 35.e4 Rg8 36.Qh2 ⩲ +0.79 (31 ply)= -0.15 (31 ply) 34.Rab1 b5 35.Qf3 Rg6 36.Rbc1 a5 37.Rc5 Kf8 38.Rd1 f5 = 0.00 (34 ply) ⩱ -0.97 (28 ply)better is 35...Rg7 36.Rd4 a6 37.Rb1 Re7 38.Re1 Rg6 39.a4 a5 40.Rc1 ⩱ -0.65 (27 ply) 36.a4 a5 37.Rd3 Rg7 38.Rc1 f5 39.Rc5 Ra8 40.Rcxd5 cxd5 = 0.00 (28 ply) 36...Re7 37.Rbd1 Rg7 38.Rd3 Kh7 39.Qe4+ Rg6 40.Qf5 f6 ⩱ -0.93 (24 ply)better is 37.Rec1 Rg6 38.Rc2 b5 39.Rbc1 Ne7 40.Rd2 a5 41.f5 Rg5 ⩲ +0.54 (30 ply)= 0.00 (36 ply) after 37...Rg6 38.Red1 f5 39.exf6 Rxf6 40.Rxc6 Rxc6 41.Rxd5 better is 38...Rg7 39.Rec1 Qg4 40.Qxg4 Rxg4 41.Rxc6 Rxc6 42.Rxc6 = 0.00 (34 ply) ⩲ +0.59 (28 ply) 40.Rd1 Rg8 41.Rd7 Qg4 42.Qxg4 Rxg4 43.Rcd2 Kg8 44.Rxa7 ⩲ +0.51 (33 ply) 40...f6 41.Rxc6 Nxc6 42.Rxc6 Rxc6 43.Qxc6 Rg6 44.Qe8+ ⩱ -1.15 (29 ply)= 0.00 (36 ply) 42.Qe4 Nxe3+ 43.Qxe3 Qh1+ 44.Ke2 Qxg2+ 45.Kd1 Qh1+ 46.Ke2 = 0.00 (37 ply) 42...Nxe3+ 43.Qxe3 Rxc6 44.Rxc6 Qh1+ 45.Qg1 Rxf4+ 46.Nf3 -+ -5.34 (35 ply)= +0.36 (34 ply) 51...f5+ 52.Kd5 Rxe5+ 53.Kxe5 g1=Q 54.Rxa7+ Kh6 55.Rh8+ = 0.00 (47 ply)+- +17.30 (33 ply)55...Rf3+ 56.Kxf3 f6 57.Kf4 g1=Q 58.Rxa7+ Kh6 59.Rh8+ +- mate-in-91-0

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
FEN COPIED

Annotations by Stockfish (Computer).      [35435 more games annotated by Stockfish]

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Kibitzer's Corner
Jul-06-15
Premium Chessgames Member
  Honza Cervenka: Exciting game. In early middle-game white's successful defense gave him clear advantage, which could have been already decisive after 30.Nxg3 Rxe5 31.Qc8+ Kh7 32.Rab1 Qa5 33.Ne4 etc. But a mistake 31.Qe4? (31.Rab1 Qxh4+ 32.Kg1 Rg5 33.Qd7 Rgxe5 34.Rxb7 holds the advantage for white) allowed black's comeback into the game, and in the move 42 black even missed a beautiful winning combination: 42...Nxe3+!! 43.Qxe3 Rxc6 44.Rxc6 Qh1+ 45.Qg1 Rxf4+ 46.Nf3 Rxf3+ 47.gxf3 Qxf3+ 48.Ke1 Qxc6 . In following tactical melee, where threats of mate were in the air on both sides but which could have resulted in equal position with correct play black once again missed nice tactical opportunity 51...f5+! 52.Kxf5 Rxe5+!! 53.fxe5! (white is still threatening with mate, for example 53...g1=Q? 54.Rxa7+ Kh6 55.Rh8#) 53...Rg5+! 54.Ke6 (or 54.Kxg5 g1=Q+ =) 54...Rg6+ 55.Kf5 (55.Ke7 already loses) 55...Rg5+ etc.
Jan-15-20  Straclonoor: <in the move 42 black even missed a beautiful winning combination: 42...Nxe3+!! 43.Qxe3 Rxc6 44.Rxc6 Qh1+ 45.Qg1 Rxf4+ 46.Nf3 Rxf3+ 47.gxf3 Qxf3+ 48.Ke1 Qxc6 >

I wanna add continuation for your superb analysis, <Honza Cervenka>

Analysis by Stockfish 070120 64 BMI2:

-+ (-6.30): 42...Nxe3+ 43.Qxe3 Qh1+ 44.Qg1 Rxc6 45.Rxc6 Rxf4+ 46.Nf3 Rxf3+ 47.gxf3 Qxf3+ 48.Ke1 Qxc6 49.Qxg3 Qe4+ 50.Kf1 Qf5+ 51.Ke1 Kh7 52.Kd2 Qg4 53.Qf2 Qg5+ 54.Kd3 Kg6 55.Ke4 Qg4+ 56.Ke3 Qf5 57.Qh2 Qg5+ 58.Ke4 Qg4+ 59.Kd5 Qd7+ 60.Ke4 Qe6 61.Kd4 Qc8 62.Kd3 Qg4 63.e6 Qxe6 64.Qh1 Qf5+ 65.Kc3 Qe5+ 66.Kb4 Qg5 67.Qc6+ Kg7 68.Qc3+ f6 69.Qc7+ Kg6 70.Qb8 h4 71.Qe8+ Kg7 72.Qe7+ Kh6 73.Qf8+ Kh5 74.Qh8+ Kg4

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